Question

If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of substance will

• A. decrease twice
• B. increase two fold
• C. remain unchanged
• D. be a function of the molecular mass of substance

Answer 1

Answer: (C)

remain unchanged

Answer 2

$1$ mole = No. of atoms in $12.0000 \,g$ of $C^{12} = 6. 022 \times 10^{23}$ Mass of $1$ mole of a substance = Actual mass of $1$ atom (or molecule) of the substance $\times 6. 022 \times 10^{23}$ As mass of $1$ mole of substance does not depend upon the atomic mass unit scale, the mass of one mole of substance will not change